On-line monitoring device and method for corona discharge of ultra-high voltage power transmission line

Abstract

The invention discloses an on-line monitoring device and method for the corona discharge of an ultra-high voltage power transmission line. The on-line monitoring device comprises a sensor unit, a signal conditioning unit, a signal processing unit, a wireless communication unit, an upper computer monitoring unit, a system failure diagnosing unit and a system power supply unit. The on-line monitoring method comprises the following steps of: carrying out signal acquisition for the field working state of power transmission equipment by the sensor unit; transforming data types through the signal conditioning unit to obtain a useful signal which can be identified by a CPU (Central Processing Unit) of the signal processing unit; sending the processed data to the wireless communication unit through a serial port by the signal processing unit; and receiving the data and carrying out failure diagnosis by an upper computer server so as to give the current operation state of the equipment, equipment parameters and a failure diagnosis result.

Description

technical field [0001] The invention relates to an on-line monitoring device for corona discharge of an extra-high voltage transmission line and an operation and fault diagnosis method, in particular to an on-line monitoring device based on dual signals of ultraviolet and leakage current and a fault diagnosis method based on data fusion. Background technique [0002] Nowadays, the construction of smart grid is booming, and the operation status of the transmission line is a direct reflection of the safety and health level of the line. By developing an advanced, applicable, stable and reliable line operation status monitoring device, the line operation information can be obtained in time, so that when hidden dangers are found Early warning and maintenance treatment, so as to avoid the occurrence of power grid accidents, has become an important link in the construction of smart grid. [0003] At present, my country mainly adopts the method of scheduled power outage maintenance ...

AI Technical Summary

Problems solved by technology

The application number is "201020170413.1" and the name is "intelligent UHV electroscope", which characterizes the intensity of the discharge by detecting the number of ultraviolet pulses generated by the discharge. Although this method has the characteristics of non-contact, strong anti-interference ability and high sensitivity , but it is difficult to identify the influence of light sources in the solar blind zone wavelengths such as lightning, flames, and cosmic rays. It is the same as the previous monitoring methods, but only uses the signal collected by a single sensor to represent the discharge intensity. The probability of misjudgment is relatively large, and the reliability not tall

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